Herein, Al-Si-Cu aluminum alloy was prepared and the effect of forging on the microstructure and mechanical properties of novel Al-9Si-5Cu-0.2Zr-0.1Sr-0.16Ti-0.1Ce cast aluminum alloy was investigated. The microstructure analyses show that after forging, the casting defects disappeared, and the irregular Si-eutectic was spheroidized and randomly distributed. The coarse intermetallic compounds (IMCs) gradually dissolved during the solution treatment, and the increased supersaturation of the matrix promoted precipitation kinetics, leading to the coexistence of dense fine θ and θ' strengthening phases. Moreover, the dislocation strengthening effect for the forged alloy was enhanced. The mechanical tests show that compared to the as-cast alloy, the mechanical properties of the forged alloy including the hardness, yield strength, tensile strength, and plasticity were improved by optimizing the microstructure.

在此，制备了Al-Si-Cu铝合金，研究了锻造对新型Al-9Si-5Cu-0.2Zr-0.1Sr-0.16Ti-0.1Ce铸造铝合金组织和力学性能的影响。显微组织分析表明，锻造后铸件缺陷消失，不规则Si共晶球化并随机分布。粗大的金属间化合物（IMCs）在固溶处理过程中逐渐溶解，基体过饱和度的增加促进了沉淀动力学，导致致密的细小θ和θ'共存强化阶段。此外，锻造合金的位错强化效果得到增强。力学试验表明，与铸态合金相比，锻造合金的硬度、屈服强度、抗拉强度和塑性等力学性能均通过显微组织的优化提高。